Feature: Import PostgreSQL 13 beta3 new parser.

Major changes of PostgreSQL 13 parser include:

- Remove an object's dependency on an extension

  ALTER TRIGGER ... NO DEPENDS ON EXTENSION ...
  ALTER FUNCTION ... NO DEPENDS ON EXTENSION ...

- Allow FETCH FIRST to use WITH TIES

  FETCH FIRST ... WITH TIES

- Add ALTER TABLE clause DROP EXPRESSION

  ALTER TABLE ... DROP EXPRESSION

- Allow setting statistics target for extended statistics

  ALTER STATISTICS ... SET STATISTICS

- Allow ALTER VIEW to rename view columns

  ALTER VIEW ... RENAME COLUMN ... TO ...

- Add CREATE DATABASE clause LOCALE option

  CREATE DATABASE ... LOCALE

- Add DROP DATABASE clause WITH FORCE option

  DROP DATABASE ... WITH (force)

- Add VACUUM clause PARALLEL option

  VACUUM (PARALLEL 1) ...

1 files changed, 10 insertions, 2 deletions

diff --git a/src/parser/outfuncs.c b/src/parser/outfuncs.c
index bb78b5ee8..214d4713d 100644
--- a/src/parser/outfuncs.c
+++ b/src/parser/outfuncs.c
@@ -3,8 +3,8 @@
  * outfuncs.c
  *	  Output functions for Postgres tree nodes.
  *
- * Portions Copyright (c) 2003-2019, PgPool Global Development Group
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
+ * Portions Copyright (c) 2003-2020, PgPool Global Development Group
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *
@@ -1002,6 +1002,11 @@ _outCreateStatsStmt(String * str, CreateStatsStmt *node)
 }
 
 static void
+_outAlterStatsStmt(String * str, const AlterStatsStmt *node)
+{
+}
+
+static void
 _outNotifyStmt(String * str, NotifyStmt *node)
 {
 	string_append_char(str, "NOTIFY ");
@@ -5842,6 +5847,9 @@ _outNode(String * str, void *obj)
 			case T_CreateStatsStmt:
 				_outCreateStatsStmt(str, obj);
 				break;
+			case T_AlterStatsStmt:
+				_outAlterStatsStmt(str, obj);
+				break;
 			case T_NotifyStmt:
 				_outNotifyStmt(str, obj);
 				break;